Steam Etched Porous Graphene Oxide Network for Chemical Sensing
- Title
- Steam Etched Porous Graphene Oxide Network for Chemical Sensing
- Author
- 한태희
- Issue Date
- 2011-10
- Publisher
- AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
- Citation
- JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 권: 133, 호: 39, 페이지: 15264-15267
- Abstract
- Oxidative etching of graphene flakes was observed to initiate from edges and the occasional defect sites in the basal plane, leading to reduced lateral size and a small number of etch pits. In contrast, etching of highly defective graphene oxide and its reduced form resulted in rapid homogeneous fracturing of the sheets into smaller pieces. On the basis of these observations, a slow and more controllable etching route was designed to produce nanoporous reduced graphene oxide sheets by hydrothermal steaming at 200 degrees C. The degree of etching and the concomitant porosity can be conveniently tuned by etching time. In contrast to nonporous reduced graphene oxide annealed at the same temperature, the steamed nanoporous graphene oxide exhibited nearly 2 orders of magnitude increase in the sensitivity and improved recovery time when used as chemiresistor sensor platform for NO(2) detection. The results underscore the efficacy of the highly distributed nanoporous network in the low temperature steam etched GO.
- URI
- http://pubs.acs.org/doi/abs/10.1021/ja205693thttp://hdl.handle.net/20.500.11754/40202
- ISSN
- 0002-7863
- DOI
- 10.1021/ja205693t
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ORGANIC AND NANO ENGINEERING(유기나노공학과) > Articles
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